.flex{
  display: flex;
}
.flex-col{
  flex-direction: column;
}
.items-center{
  align-items: center;
}
.justify-center{
  justify-content: center;
}
.justify-between{
  justify-content: space-between;
}
.flex-center-box{
  @extend .flex,
  .items-center,
  .justify-center;
}
.flex-1	{
  flex: 1 1 0%;
}